Medical Face Mask with Sealing Strip

ABSTRACT

The present invention relates to a face mask for filtering contaminants from the air that is suitable for medical applications. In one embodiment, the face mask of the present invention comprises an air-permeable body with an inner seal connected to the inner surface of the body, and at least one strap for securing the face mask to the wearer&#39;s face. In another embodiment, the face mask of the present invention further comprises an outer seal connected the perimeter of the air-permeable body.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. 119(e) to U.S. Provisional Patent Application No. 61/819,969 filed May 6, 2013, which is incorporated by reference herein in its entirety.

BACKGROUND OF THE INVENTION

Face masks are often used as personal protective equipment in a variety of situations, such as during medical treatment or in dusty environments. Medical personnel, such as nurses and surgeons, often need to wear face masks when providing care to a patient. Such face masks are generally designed to filter airborne contaminants from the air being inhaled by the user in order to protect the user from inhaling pathogens and other contaminants, while also protecting people near the user from inhaling contaminants exhaled by the user. Such airborne contaminants may include aerosolized saliva, bacteria, viruses, dust, or any other type of particle that can be suspended in air.

Face masks currently available are typically produced with one of two types of protection. Both types of masks are made by a variety of different manufacturers. The type of mask with the highest level of protection is the N95 mask, which refers to an efficiency rating determined by the National Institute for Occupational Safety and Health (NIOSH). The “N95” designation corresponds to a mask that blocks about 95% of particles that are 0.3 microns or larger. With testing for proper fit, these masks can provide good protection against inhaling harmful particles.

On the other hand, the type of mask used most frequently in healthcare environments is the “surgical” or “procedure” mask. The surgical masks presently available do not provide a complete seal with the user's face, resulting in a lower filtering capability compared to N95 masks. However, these surgical masks are significantly less expensive than N95 masks. These surgical masks are typically constructed from a flat, pleated filter material that spreads when the mask is worn. When the mask is secured to the user's face, gaps between the filter material and the wearer's face can occur. While these masks may protect the wearer from particles impacting directly against the mask, they offer little or no protection from contaminants suspended in air that can pass around the edges of the mask into the wearer's lungs.

Thus, there is a continuing need in the art for a surgical face mask that provides an improved seal with the user's face, but is less expensive than a N95 mask. The present invention addresses this unmet need in the art.

SUMMARY OF THE INVENTION

The present invention relates to a face mask for filtering contaminants from air, comprising: an air-permeable body having an outer surface, an inner surface, and a perimeter, wherein the body is sized to cover the nose and mouth of a subject when worn by the subject; an inner seal connected to the inner surface of the body; and at least one strap connected to the body for securing the face mask to the subject's face. In one embodiment, the face mask may further comprise an outer seal connected to the perimeter of the body.

In one embodiment, the air-permeable body is substantially rectangular in shape. In one embodiment, a portion of at least one corner of the air-permeable body is folded towards the inner surface, thereby creating at least one two-layered region of the air-permeable body when worn by the subject. Accordingly, the width of the air-permeable body at the two-layered region may be less than the width of the air-permeable body at it widest point. In another embodiment, the portion of the at least one corner of the air-permeable body that is folded towards that inner surface is attached to the inner surface of the air-permeable body.

In various embodiments, the face mask may comprise different lengths, for example about 160 mm, 180 mm, 220 mm, or 230 mm. Further, in various embodiments, the face mask may comprise different widths at its widest point, for example about 65 mm, 70 mm, 75 mm, or 85 mm. Further still, in various embodiments, the inner seal may comprise different widths, for example about 101 mm, 111 mm, or 134 mm

In one embodiment, the inner seal of the face mask of the present invention is configured to form a seal around the subject's nose and mouth when worn by the subject. In other embodiment, the inner seal comprises at least one leaflet for conforming a portion of the inner seal to the subject's nose. In another embodiment, the inner seal is connected to the inner surface of the body by at least one connector strip or connector tab.

In one embodiment, the body of the face mask of the present invention comprises pleats for allowing the shape of the body to be adjusted. In another embodiment, the body comprises a non-woven material. In one embodiment, the at least one strap comprises a clasp. In one embodiment, the face mask of the present invention filters at least about 95% of contaminants in air that are 0.3 microns or larger, i.e., the face mask meets N95 requirements.

In various embodiments, the inner seal and outer seal of the face mask of the present invention comprise an elastomeric material. In one embodiment, the inner seal comprises silicone. In one embodiment, the outer seal comprises a TPE/EVA, polyurethane (PU), or TPE/EVA/PU foam.

BRIEF DESCRIPTION OF THE DRAWINGS

The following detailed description of preferred embodiments of the invention will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown in the drawings embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities of the embodiments shown in the drawings.

FIG. 1 is an illustration showing the outside of a facial mask, according to one embodiment of the present invention.

FIG. 2 is an illustration showing a perspective view of the inside of a facial mask, according to one embodiment of the present invention.

FIG. 3 is an illustration showing the inside of a facial mask, according to one embodiment of the present invention.

FIG. 4 is an illustration showing the inside of a facial mask, according to one embodiment of the present invention.

FIG. 5 is an illustration showing the outside of a facial mask, according to one embodiment of the present invention.

FIG. 6 is an illustration showing a perspective view of the outside of a facial mask, according to one embodiment of the present invention.

FIG. 7 is an illustration showing a perspective view of the inside of a facial mask, according to one embodiment of the present invention.

FIG. 8 is an illustration showing a perspective view of the inside of a facial mask, according to one embodiment of the present invention.

FIG. 9 is a set of illustrations showing the inner seal of a facial mask, according to one embodiment of the present invention, wherein the inner seal is positioned on a user's face.

FIG. 10 is an illustration showing a perspective view of the inside of a facial mask, according to one embodiment of the present invention.

FIG. 11 is a set of illustrations showing the inside of various embodiments of the facial mask of the present invention.

FIG. 12 is a set of illustrations of facial masks. FIG. 12A shows an inside view and side view of a facial mask, according to one embodiment of the present invention. FIG. 12B shows an inside view and side view of a common facial mask, i.e., a mask currently available in the art.

FIG. 13 is an illustration showing a perspective view of the inside of a facial mask, according to one embodiment of the present invention.

FIG. 14 is an illustration showing a perspective view of the outside of a facial mask, according to one embodiment of the present invention.

DETAILED DESCRIPTION

It is to be understood that the figures and descriptions of the present invention have been simplified to illustrate elements that are relevant for a clear understanding of the present invention, while eliminating, for the purpose of clarity, many other elements found in medical face masks. Those of ordinary skill in the art may recognize that other elements and/or steps are desirable and/or required in implementing the present invention. However, because such elements and steps are well known in the art, and because they do not facilitate a better understanding of the present invention, a discussion of such elements and steps is not provided herein. The disclosure herein is directed to all such variations and modifications to such elements and methods known to those skilled in the art.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods, materials and components similar or equivalent to those described herein can be used in the practice or testing of the present invention, the preferred methods and materials are described.

As used herein, each of the following terms has the meaning associated with it in this section.

The articles “a” and “an” are used herein to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article. By way of example, “an element” means one element or more than one element.

“About” as used herein when referring to a measurable value such as an amount, a temporal duration, and the like, is meant to encompass variations of ±20%, ±10%, ±5%, ±1%, or ±0.1% from the specified value, as such variations are appropriate.

The terms “contaminant,” “particle,” and the like may be used interchangeably herein, and refer to a constituent or impurity in the air or environment surrounding the user of the mask of the present invention that can adversely affect the user if inhaled.

Throughout this disclosure, various aspects of the invention can be presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention. Accordingly, the description of a range should be considered to have specifically disclosed all the possible subranges as well as individual numerical values within that range. For example, description of a range such as from 1 to 6 should be considered to have specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1, 2, 2.7, 3, 4, 5, 5.3, 6 and any whole and partial increments therebetween. This applies regardless of the breadth of the range.

The present invention relates to a face mask that filters contaminants from air during inhalation and exhalation. The face mask of the present invention provides a more complete seal than face masks in the prior art, thereby decreasing the risk of contaminants bypassing the face mask's filter during inhalation or exhalation. In one embodiment, the face mask comprises a seal within the mask that fits around the nose and mouth of the user, i.e., an inner seal. In another embodiment, the face mask comprises two seals for sealing the mask to the user's face: an inner seal and also a seal around the edge of the mask, i.e., an outer seal. The mask also comprises an air-permeable body that serves to filter contaminants from air and a mechanism for securing the mask to the user's face, for example a strap that connects to the mask and can be positioned around the user's head.

Referring now to the drawings, FIG. 1 is an illustration of one embodiment of a face mask 10 of the present invention. FIG. 1 shows the outside of face mask 10, comprising an air-permeable body 12 and straps 14. Straps 14 may be used to secure face mask 10 to the user's face by placing straps 14 around the user's ears. Air-permeable body 12 of face mask 10 comprises a number of pleats 13 that allow for air-permeable body 12 to be stretched and configured without damaging or compromising the structural integrity of air-permeable body 12.

In one embodiment of the face mask of the present invention, the air-permeable body 12 comprises a non-woven material or fabric. Non-woven materials are materials comprising fibers or filaments that are bound together mechanically, thermally, or chemically. The fibers or filaments are typically composed of synthetic polymers, but can be composed of any material suitable for both filtering particulates and contacting human skin, as would be understood by a person with ordinary skill in the art.

In one embodiment, straps 14 are configured to be placed around the ears of the user. In another embodiment, the straps are configured to be placed around the head or neck of the user. In one embodiment, the straps comprise an elastomeric material suitable for securing the mask to the user's face. In another embodiment, the straps further comprise a clasping mechanism for securing the straps around the user's head or neck.

Referring to FIG. 2, an illustration of a perspective view of the inside of face mask 10 is shown, i.e., the side of face mask 10 that is in contact with the user's face when face mask 10 is worn. Face mask 10 comprises air-permeable body 12, an inner seal 16 and an outer seal 18.

In one embodiment of the present invention, the inner seal 16 of the face mask of the present invention comprises a relatively soft material that forms a substantially circular or elliptical shape around the user's nose and mouth when the mask is worn. Referring to FIG. 9, a series of illustrations shows inner seal 16 conforming to a user's face. In one embodiment, inner seal 16 further comprises wider or thicker regions, also referred to herein as leaflets 20, that conform to the shape of the user's face on either side of the user's nose to improve the sealing characteristics of inner seal 16. In one embodiment, inner seal 16 comprises a region 22 between leaflets 20 that forms a seal with the bridge of the user's nose. In various embodiments, the length of region 22 may be sized appropriately so that leaflets 20 form a seal with the sides of the user's nose, i.e., so an optimal seal is formed in the area of the user's face where there are creases between the user's nose and cheeks. Further, in one embodiment, inner seal 16 comprises a side loop 23 that fits around the side of user's cheek in order to provide an optimal seal with the user's face. In one embodiment, the inner seal is made of silicone. In another embodiment, the inner seal may comprise any elastomeric material such as a thermoplastic elastomer (TPE), or a combination of materials such as TPE with ethylene-vinyl acetate (EVA) and/or polyurethane (PU), suitable for forming an air-tight seal around the user's nose and mouth.

In one embodiment, the outer seal 18 of the present invention comprises a relatively soft material that can conform to the contours of the user's face in order to form an air-tight seal between the air-permeable body of the present invention and the user's face. In one embodiment, the outer seal comprises foam made from a TPE/EVA blended resin. In another embodiment, the foam of the outer seal comprises polyurethane. In another embodiment, the outer seal may comprise any material, or combination of materials, suitable for forming an air-tight seal between the mask and the user's face. In yet another embodiment, the face mask of the present invention may comprise only one seal, wherein the single seal is an outer seal instead of an inner seal.

In one embodiment, a mild adhesive may be used in conjunction with the inner seal, outer seal, or both, in order to further improve the quality of the seal between the mask and the user's face. In another embodiment, the inner seal, outer seal, or both, may comprise an elastomeric material that is formulated to produce a sticky or tacky effect, in order to further improve the quality of the seal between the mask and the user's face

Referring to FIG. 3, an illustration of the inside of face mask 10 is shown. Face mask 10 comprises straps 14, inner seal 16, and outer seal 18. Inner seal 16 is attached to face mask 10 at two points via connector strips 15. The dimensions of various parts of an exemplary embodiment of face mask 10 are also shown in FIG. 3, in millimeters (mm). FIG. 3 shows one possible configuration of face mask 10, in which air-permeable body 12 and inner seal 16 are not stretched vertically, i.e., the inner seal is in a relaxed state. Specifically, the height of air-permeable body 12 is about 60 mm at all points, while the width of inner seal 16 is about 150 mm. The overall width of air-permeable body 12 is about 230 mm.

In various embodiments, the face mask of the present invention can be configured or adjusted to fit the contours of the user's face. In one embodiment, pleats 13 in the air-permeable body 12 allow for the body to be stretched to match the dimensions of the user's face. In one embodiment, outer seal 18 is suitably flexible to stretch or adjust in conjunction with air-permeable body 12 without separating or detaching from air-permeable body 12.

In one embodiment, inner seal 16 is attached to air-permeable body 12 via at least one connector strip 15. In a preferred embodiment, inner seal 16 is attached to air-permeable body 12 via two connector strips, such that the inner seal 16 can maintain sufficient flexibility to change shape when air-permeable body 12 is adjusted vertically, while remaining connected to air-permeable body 12. In one embodiment, each connector strip 15 serves to fasten inner seal 16 to air-permeable body 12 in a single location, thereby leaving the remaining portion of inner seal 16 unconnected to air-permeable body 12. In such an embodiment, most of inner seal 16 is free-floating, i.e., unconnected to air-permeable body 12 or any other part of face mask 10, in order to allow inner seal 16 to adjust and conform to the user's face when worn by the user. In one embodiment, inner seal 16 is forced against air-permeable body 12 when worn by the user, thereby forming a seal between inner seal 16 and air-permeable body 12, in addition to the seal formed between inner seal 16 and the user's face. In such an embodiment, the seal formed between inner seal 16 and air-permeable body 12 is a mechanical seal resulting from the pressure of inner seal 16 against air-permeable body 12 caused by the force of the user's face pushing against inner seal 16.

Referring to FIG. 4, an illustration of the inside of face mask 10 is shown, in which a portion of face mask 10 has been stretched to match the dimensions of a user's face, i.e., to cover the user's nose and mouth. Specifically, the height of air-permeable body 12 is about 130 mm at its fully expanded point, while the width of inner seal 16 is about 100 mm (compared to 150 mm in FIG. 3). Notably, the overall width of air-permeable body 12 is about 230 mm, i.e., the same as in FIG. 3. Therefore, as depicted in FIG. 4, inner seal 16 and a portion of air-permeable body 12 have been stretched vertically without substantially changing the overall width of air-permeable body 12. Further, the shape of outer seal 18 has been adjusted accordingly with air-permeable body 12.

Referring to FIG. 5, an illustration of the outside of face mask 10 is shown, in which air-permeable body 12 has been configured to cover the user's nose and mouth. As described herein, air-permeable body 12 comprises pleats 13 that enable air-permeable body 12 to be stretched without reducing or compromising the structural integrity of air-permeable body 12.

Referring to FIG. 6, an illustration of a perspective view of the outside of face mask 10 is shown. Connector strips 15 are used to attach the inner seal 16 (not shown) to air-permeable body 12 of face mask 10. In this view, face mask 10 is configured to the approximate shape of face mask 10 when it is secured to a user's face. In this embodiment, straps 14 may be secured around the user's ears to secure face mask 10 to the user's face, while air-permeable body 12 is configured to cover the user's nose and mouth.

Referring to FIG. 7, an illustration of a perspective view of the inside of face mask 10 is shown. In this embodiment, air-permeable body 12 and inner seal 16 are configured to cover the user's nose and mouth, similarly to FIG. 6. Outer seal 18 maintains the shape of the perimeter of air-permeable body 12. Connector strips 15 connect inner seal 16 to air-permeable body 12. Further, inner seal 16 comprises leaflets 20, i.e., a wider region of the inner seal, that provide an optimal fit of inner seal 16 to the bridge of the user's nose. As contemplated herein, inner seal may include additional leaflet regions to provide additional depth and/or thickness to better conform to the user's facial contours, such as around the cheeks, mouth and portion of the chin.

Referring to FIG. 8, an illustration of a perspective view of face mask 10, comprising inner seal 16 is shown.

Referring to FIG. 10, an illustration of the inside of another embodiment of the face mask of the present invention is shown. Face mask 30 comprises an air-permeable body 12, straps 14, and an inner seal 16. Inner seal 16 is connected to air-permeable body 12 via connector tabs 26. Inner seal 16 comprises a bottom region 24 that is wider than other areas of inner seal 16, much like leaflets 20. Bottom region 24 may be suitable for forming a seal with an area on user's chin. Air-permeable body 12 of face mask 30 comprises angled regions 32, wherein the height of air-permeable body 12 reduces from its widest point to its narrowest point near the part of face mask 30 where straps 14 are connected. In one embodiment, angled region 32 is created by manufacturing air-permeable body 12 in a shape that is generally rectangular, but with a sloping angle near the ends of the rectangle, i.e., a reduced width at each of the four corners of the rectangle as compared to the width at the center of the rectangle.

In another embodiment, angled regions 32 are created by manufacturing air-permeable body 12 in the shape of a rectangle, then folding each of the four corners of the rectangle toward the inside surface of air-permeable body 12. An example of such an embodiment is shown in FIG. 11. In FIG. 11, four embodiments of face mask 30 are shown, wherein each embodiment comprises the same shape and features, but with different dimensions, as indicated. Angled regions 32 are shown on air-permeable body 12, wherein a portion of air-permeable body 12 has been folded to create flaps 34 at each corner of air-permeable body 12. Accordingly, a region near each of the four corners of air-permeable body 12 has two layers of material where flaps 34 have been folded. Flaps 34 may improve the seal between the user's face and air-permeable body 12 by increasing the stiffness of at least a portion of air-permeable body 12, which may prevent undesired folding of face mask 30 when worn by the user. Further, flaps 34 may be used to secure, or aid in securing, straps 14 to air-permeable body 12. In one embodiment, flaps 34 may be secured to the inner surface of air-permeable body by any means that would be understood by a person of ordinary skill, for example, but not limited to, an adhesive or a clamp.

In addition, the width of the region of air-permeable body 12 that has been folded to form flaps 34 is less than other regions of air-permeable body 12. In one embodiment, this reduced width at the ends of air-permeable 12 may improve the seal of the face mask of the present invention to the user's face by providing a narrower region where straps 14 can connect to face mask 30. Such a narrow region may reduce the possibility of folds or gaps being created when the straps are attached to the user, for example when straps 14 are placed around the user's ears.

As shown in FIG. 11, in various embodiments, face mask 30 may comprise different lengths, for example 160 mm, 180 mm, 220 mm, or 230 mm. Further, face mask 30 may comprise different widths at its widest point, for example 65 mm, 70 mm, 75 mm, or 85 mm. Further still, inner seal 16 may comprise different widths, for example 101 mm, 111 mm, or 134.36 mm. However, as would be understood by a person with ordinary skill in the art, the present invention is not limited to the dimensions described herein.

In one embodiment, face mask 30 differs from face mask 10 by eliminating the outer seal of face mask 10. Accordingly, flaps 34 may create an air-tight seal between the user's face and face mask 30 without the need for an outer seal. However, in another embodiment, at least a portion of the perimeter of air-permeable body 12 of face mask 30 comprises an outer seal.

Referring to FIG. 12, a comparison between an embodiment of the face mask of the present invention and an embodiment of a face mask currently available is shown, including some relevant dimensions of both face masks. The diagram at the left of FIG. 12A shows the inside of face mask 30 of the present invention, wherein the diagram at the right shows the profile of face mask 30. The image at the left of FIG. 12B shows the inside of a face mask of a type currently available wherein the image at the right shows the profile of the face mask currently available. As can been seen in FIG. 12, this embodiment of face mask 30 differs from the currently available face mask in a number of respects such as, but not limited to: face mask 30 is substantially longer than the face mask in FIG. 12B (220 mm vs, 175 mm, excluding the size of the ear straps); face mask 30 comprises an inner seal 16, whereas the mask in FIG. 12B does not; and ear straps 14 of face mask 30 are connected to the mask to allow for flaps 34 to be folded, while the mask in FIG. 12B does not have such flaps, and could not have such flaps, because the ear straps of the mask in FIG. 12B are connected close to the edge of the corners of the rectangle.

Accordingly, these differences between face mask 30 and the face mask in FIG. 12B, at least, result in improved sealing of face mask 30 to the user's face when compared to the mask in FIG. 12B. For example, the longer size of face mask 30, along with flaps 34, optimizes the seal of the mask at the sides of the user's face, i.e., the area of the user's face closest to the user's ears. In addition, the inner seal of face mask 30 creates an air-tight seal around the user's nose and mouth. Conversely, the face mask in FIG. 12B allows for gaps between the mask and the user's face when worn by the user, created, for example, by the body of the mask folding or bunching, or by the lack of a mechanism properly adhere the mask to the different contours of the user's face. Accordingly, the mask in FIG. 12B cannot provide an optimal, air-tight seal to all portions of the user's face.

Referring to FIG. 13, an illustration of one embodiment of the inside of face mask 30 is shown, comprising angled regions 32. In this embodiment, an embodiment of inner seal 16 is shown, wherein inner seal 16 comprises a region 22 between leaflets 20 that is wide enough to form an optimal seal with the bridge of the user's nose.

Referring to FIG. 14, an illustration of a perspective view of the outside of face mask 30 is shown.

The disclosures of each and every patent, patent application, and publication cited herein are hereby incorporated herein by reference in their entirety.

While this invention has been disclosed with reference to specific embodiments, it is apparent that other embodiments and variations of this invention may be devised by others skilled in the art without departing from the true spirit and scope of the invention. The appended claims are intended to be construed to include all such embodiments and equivalent variations. 

1. A face mask for filtering contaminants from air, comprising: an air-permeable body having an inner surface, wherein said body is sized to cover the nose and mouth of a subject when worn by said subject, said air-permeable body is substantially rectangular in shape, and a portion of at least one corner of said air-permeable body is folded towards said inner surface, thereby creating at least one two-layered region of said air-permeable body when worn by said subject, and wherein the width of said air-permeable body at said two-layered region is less than the width of said air-permeable body at it widest point; an inner seal connected to said inner surface of said body; and at least one strap connected to said body for securing said face mask to said subject's face.
 2. The face mask of claim 1, wherein said air-permeable body is about 160 mm long and about 65 mm wide at its widest point.
 3. The face mask of claim 1, wherein said air-permeable body is about 180 mm long and 70 mm wide at its widest point.
 4. The face mask of claim 1, wherein said air-permeable body is about 220 mm long and about 75 mm wide at its widest point.
 5. The face mask of claim 1, wherein said air-permeable body is about 230 mm long and about 85 mm wide at its widest point.
 6. The face mask of claim 1, wherein said inner seal is about 101 mm wide.
 7. The face mask of claim 1, wherein said inner seal is about 111 mm wide.
 8. The face mask of claim 1, wherein said inner seal is about 134 mm wide.
 9. The face mask of claim 1, wherein at least one strap is connected to said body near said at least one two-layered region.
 10. The face mask of claim 1, wherein the portion of said at least one corner of said air-permeable body folded towards said inner surface is attached to said inner surface.
 11. The face mask of claim 1, wherein said mask filters at least about 95% of contaminants in air that are 0.3 microns or larger.
 12. The face mask of claim 1, wherein said body comprises pleats for allowing the shape of said body to be adjusted.
 13. The face mask of claim 1, wherein said inner seal is configured to form a seal around said subject's nose and mouth when worn by said subject.
 14. The face mask of claim 1, wherein said inner seal comprises at least one leaflet for conforming a portion of said inner seal to said subject's nose.
 15. A face mask for filtering contaminants from air, comprising: an air-permeable body having an outer surface, an inner surface, and a perimeter, wherein said body is sized to cover the nose and mouth of a subject when worn by said subject; an outer seal connected to said perimeter of said body; an inner seal connected to said inner surface of said body; and at least one strap connected to said body for securing said face mask to said subject's face.
 16. The face mask of claim 15, wherein said body comprises pleats for allowing the shape of said body to be adjusted.
 17. The face mask of claim 15, wherein said inner seal is configured to form a seal around said subject's nose and mouth when worn by said subject.
 18. The face mask of claim 15, wherein said inner seal comprises at least one leaflet for conforming a portion of said inner seal to said subject's nose.
 19. The face mask of claim 15, wherein said inner seal is connected to said inner surface of said body by at least one connector strip.
 20. The face mask of claim 15, wherein said body comprises a non-woven material.
 21. The face mask of claim 15, wherein said inner seal comprises silicone.
 22. The face mask of claim 15, wherein said outer seal comprises a TPE/EVA foam.
 23. The face mask of claim 15, wherein said outer seal comprises polyurethane.
 24. The face mask of claim 15, wherein said mask filters at least about 95% of contaminants in air that are 0.3 microns or larger.
 25. The face mask of claim 15, wherein said at least one strap comprises a clasp.
 26. A face mask for filtering contaminants from air, comprising: an air-permeable body having an inner surface, wherein said body is sized to cover the nose and mouth of a subject when worn by said subject; an inner seal connected to said inner surface of said body; and at least one strap connected to said body for securing said face mask to said subject's face.
 27. The face mask of claim 26, wherein said air-permeable body is substantially rectangular in shape.
 28. The face mask of claim 27, wherein a portion of at least one corner of said air-permeable body is folded towards said inner surface, thereby creating at least one two-layered region of said air-permeable body when worn by said subject.
 29. The face mask of claim 26, wherein said inner seal is configured to form a seal around said subject's nose and mouth when worn by said subject.
 30. The face mask of claim 26, wherein said inner seal comprises at least one leaflet for conforming a portion of said inner seal to said subject's nose.
 31. The face mask of claim 26, wherein said inner seal is connected to said inner surface of said body by at least one connector strip or connector tab.
 32. The face mask of claim 26, wherein said body comprises a non-woven material.
 33. The face mask of claim 26, wherein said inner seal comprises silicone.
 34. The face mask of claim 26, wherein said mask filters at least about 95% of contaminants in air that are 0.3 microns or larger.
 35. The face mask of claim 26, wherein said at least one strap comprises a clasp.
 36. The face mask of claim 26, wherein said body comprises pleats for allowing the shape of said body to be adjusted.
 37. A face mask for filtering contaminants from air, comprising: an air-permeable body having an inner surface, wherein said body is sized to cover the nose and mouth of a subject when worn by said subject, and further wherein a portion of at least one corner of said body is folded towards said inner surface, thereby creating at least one two-layered region of said body when worn by said subject. an inner seal connected to said inner surface of said body; and at least one strap connected to said body for securing said face mask to said subject's face. 